-\b Telnet allows you to pass some settings on to the server, such as
-environment variables. (These control various aspects of the
-server's behaviour. You can usually set them by entering commands
-into the server once you're connected, but it's easier to have
-Telnet do it automatically.) SSH and Rlogin do not support this.
-However, most modern Telnet servers don't allow it either, because
-it has been a constant source of security problems.
-
-\b SSH and Rlogin both allow you to log in to the server without
-having to type a password. (Rlogin's method of doing this is
+\b SSH and Rlogin both allow you to \I{passwordless login}log in to the
+server without having to type a password. (Rlogin's method of doing this is